Optic nerve disturbance caused by frontal and fronto-ethmoidal mucopyoceles.

We saw three cases of optic nerve disturbance caused by frontal and fronto-ethmoidal mucopyoceles. A causative factor of optic nerve disturbance due to pyoceles might be not only related to compression but also to inflammatory invasion and vascular disturbance. The importance of axial and coronal computed tomography scans is emphasized for evaluating the extension of mucopyoceles and the relationship between the lesion and the adjacent structures.